derek.holloway
7502bf64a4
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68 lines
2.2 KiB
ArmAsm
68 lines
2.2 KiB
ArmAsm
// REQUIRES: arm
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// RUN: llvm-mc -filetype=obj -triple=armv7a-linux-gnueabihf --arm-add-build-attributes %s -o %t.o
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// RUN: echo "SECTIONS { \
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// RUN: .text0 0x011006 : { *(.text.00) } \
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// RUN: .text1 0x110000 : { *(.text.01) *(.text.02) *(.text.03) \
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// RUN: *(.text.04) } \
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// RUN: .text2 0x210000 : { *(.text.05) } } " > %t.script
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// RUN: ld.lld --script %t.script --fix-cortex-a8 --shared -verbose %t.o -o %t2 2>&1
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// RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t2 | FileCheck %s
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/// Test cases for Cortex-a8 Erratum 657417 that involve interactions with
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/// range extension thunks. Both erratum fixes and range extension thunks need
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/// precise information and after creation alter address information.
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.thumb
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.section .text.00, "ax", %progbits
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.thumb_func
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early:
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bx lr
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.section .text.01, "ax", %progbits
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.balign 4096
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.globl _start
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.type _start, %function
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_start:
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beq.w far_away
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/// Thunk to far_away and state change needed, size 12-bytes goes here.
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// CHECK: 00110004 <__ThumbV7PILongThunk_far_away>:
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// CHECK-NEXT: 110004: movw r12, #65524
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// CHECK-NEXT: movt r12, #15
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// CHECK-NEXT: add r12, pc
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// CHECK-NEXT: bx r12
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.section .text.02, "ax", %progbits
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.space 4096 - 22
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.section .text.03, "ax", %progbits
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.thumb_func
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target:
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/// After thunk is added this branch will line up across 2 4 KiB regions
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/// and will trigger a patch.
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nop.w
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bl target
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/// Expect erratum patch inserted here
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// CHECK: 00110ffa <target>:
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// CHECK-NEXT: 110ffa: nop.w
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// CHECK-NEXT: bl 0x111004 <__CortexA8657417_110FFE>
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// CHECK: 00111004 <__CortexA8657417_110FFE>:
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// CHECK-NEXT: 111004: b.w 0x110ffa <target>
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/// Expect range extension thunk here.
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// CHECK: 00111008 <__ThumbV7PILongThunk_early>:
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// CHECK-NEXT: 111008: b.w 0x11006 <early>
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.section .text.04, "ax", %progbits
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/// The erratum patch will push this branch out of range, so another
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/// range extension thunk will be needed.
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beq.w early
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// CHECK: 11100c: beq.w 0x111008 <__ThumbV7PILongThunk_early>
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.section .text.05, "ax", %progbits
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.arm
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nop
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.type far_away, %function
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far_away:
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bx lr
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